Sapphire optical window
- Features Extreme Surface Hardness Chemical Resistance
- Transmits Wavelengths Ranging From UV to Mid-Infrared
- Thinner and Stronger than Standard Glass Windows
- Anti-Reflection Coating Options Covering 350 – 5000nm Available
A sapphire optical window is a durable, highly transparent component made from synthetic sapphire, offering excellent optical clarity and scratch resistance. It has high thermal and chemical stability, making it ideal for harsh environments. Sapphire windows provide superior transmission from ultraviolet (UV) to infrared (IR) wavelengths. They are widely used in aerospace, defense, medical, and industrial applications. Custom sizes and coatings are available to meet specific requirements.
General Specification
| Bevel: | Protective as needed |
| Clear Aperture (%): | ≥90 |
| Edges: | Fine Ground |
| Knoop Hardness (kg/mm2): | 1900 |
| Parallelism (arcmin): | ≤3.5 |
| Poisson’s Ratio: | 0.27 |
| Young’s Modulus (GPa): | 435 |
| Abbe Number (vd): | 72.24 |
| Axis Orientation: | Random |
| Birefringence (no-ne): | 0.008 for Visible Light Orthogonal to Optical Axis |
| Index of Refraction (nd): | 1.77 |
| Substrate: | Sapphire (Al2O3) |
| Surface Quality: | 80-50 |
| Coefficient of Thermal Expansion CTE (10-6/°C): | 8.8 |
| Density (g/cm3): | 3.97 |
